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KROK 2 Dentistry 2015 Questions | KROKEXAM
Browse 2015 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
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A 32-year-old patient has made an appointment with a dental surgeon to have oral cavity sanation performed prior to denture installation. During examination the doctor stated the following: the crown of the 25th tooth is destroyed. The tooth root is stable, and its percussion is painless. Mucosa of alveolar process is unchanged. X-ray imaging reveals slight widening of periodontal fissure. What provisional diagnosis can be made?
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A 10-year-old girl complains of an aesthetic flaw. The anamnesis states, that she had been sucking her right thumb up to the age of 7 Objectively: the face lower third is somewhat reduced. The sagittal fissure between the upper and lower incisors, is 9 mm wide, class 2 according to the Angle classification. Eshler-Bittner test leads to initial temporary improvement of the girl's face, followed by renewed deterioration. What clinical malocclusion is the most probable in this case?
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A 35-year-old patient complains about itch, burning and edema of lips. These presentations occured a week ago. Objectively: there is reddening of vermilion border and skin, especially in the region of mouth corners, there are also vesicles, crusts, small cracks along with erythematous affection of vermilion border. What is the most likely diagnosis?
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A 44-year-old male patient complains of fatigue and headache, limb numbness, dry mouth, burning and pain in the tongue. Objectively: skin and oral mucosa are pale. There are painful cracks in the corners of mouth. Dorsum of tongue is smooth, glossy, with bright red striae. Blood count: Hb- 70 g/l, RBCs - 1,5 × 1012/l, colour index - 1,6, leukopenia, thrombocytopenia, lymphocytosis. What is the most likely diagnosis?
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A 35-year-old male patient is prescribed adhesive dental bridge. Objectively: the 15th tooth is lost. The 14th and 16th abutment teeth are stable. The teeth crowns are of medium height. The teeth equator is pronounced. Occlusion is orthognathic. What area of the abutment teeth MUST NOT be covered with denture framework?
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When a prosthodontist was preparing the patient's tooth, the patient had epileptic seizure that was subsequently terminated. What mistake had been made by the doctor?
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A 30-year-old patient complains of toothache caused by hot and cold stimuli. The pain irradiates to the ear and temple. Previously there was spontaneous nocturnal toothache. Objectively: on the occlusal surface of the 37 tooth there is a deep carious cavity communicating at one point with the tooth cavity. Probing at the communication point, as well as cold stimulus, cause acute pain. The pain persists for a long time. Electric pulp test result is 55 mA. What is the most likely diagnosis?
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A 34-year-old-patient complains of hard tissues defect of the 21st and 22nd teeth. He is referred for porcelain-fused-to-metal crowns installation for his 21st and 22nd teeth without removal of tooth pulp. What kind of anaesthesia administration should be used in tooth preparation?
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An 8-year-old child needs his 74th tooth extracted due to exacerbation of chronic periodontitis. What kind of anaesthesia should be used?
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A 25-year-old patient complains of pain caused by eating sweet, hot and cold food; pain ceases, when stimulation stops. Objectively: the adjoining surface of the 36th tooth has a deep carious cavity localised in the ci-rcumpulpar dentin. The dentin is softened. Probing of the carious cavity floor is painful. What is the most probable diagnosis?
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A 24-year-old patient complains of aching pain in the 11 tooth that is getting worse during biting down on food. Two days ago the tooth was filled for pulpitis. Objectively: the 11 tooth is filled. The thermal test causes no pain, vertical percussion is slightly painful. X-ray picture of the 11 tooth shows that the endodontic filling is 1 mm above the root apex. Which of the following methods will be most effective for eliminating this complication?
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A removable denture is being made for a patient. At the stage of designinig the denture accessory material - isocol - is used. What group does it belong to?
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A 46-year-old patient, after his recovery from flu, has suddenly started suffering from pain in the 36th tooth, the crown of which had been destroyed. The soft tissues surrounding the lower jaw are swollen. There are high fever up to 39°C and chill observed. Objectively: there is prominent swelling of the left lower jaw alveolar mucosa (both oral and vestibular surfaces). The 34th, 35th and 37th intact teeth are mobile. Percussion is painful. The gingival pockets produce purulent exudate. Vincent's symptom is observed. What diagnosis can be assumed?
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A doctor treating an AIDS-positive patient has accidentally pierced his own skin of the palm with a root needle. What should be the first course of actions?
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A 45-year-old patient complains of missing teeth in the lower jaw on the right. Objectively: the 46, 45, 38, 48 teeth are missing. The 47 tooth is mobile (1 grade mobility), the crown of the 44 tooth is decayed by 1/2. What orthopedic construction should be recommended for restoration of masticatory efficiency and prevention of periodontal overload of the 47, 44 teeth?
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A 53-year-old female patient complains of feeling of tightness and coarseness in the mucosa, the red border and the skin of the face. Objectively: the skin of the face has butterflyshaped damage, the red border is infiltrated and tightly covered in hyperkeratinized scales. When an attempt is made to remove them, they bleed and are painful. What disease is this clinical presentation characteristic of?
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A 7-year-old boy complains of increased body temperature, up to 38°C, headache, sore throat. Objectively: there are erosions on the slightly hyperemic mucosa of the soft palate, anterior palatal bars, tonsils. The submandibular lymph nodes are slightly enlarged, painless. Name the causative agent of this disease.
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A 12-year-old girl has complaint of carious cavity in a tooth. Objectively: there is class 1 carious cavity according to the Black's classification in the 36th tooth; it is localised in the parapulpar dentin; the mouth of the cavity is wide. The dentin is dense and pigmented. It is sensitive to cold stimulus, percussion is painless. What is the most probable diagnosis?
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A 35-year-old female patient has complaints of cosmetic defects of the front upper teeth crowns. The defects have been increasing for the last 10 years. The patient suffers from unpleasant sensations when brushing her teeth, and when chemical stimuli are applied. Objective examination revealed defects localised in the enamel of the front upper teeth vestibular surface. The defects are oval, saucershaped, and have clear margins. Probing and cold stimuli sensitivity test resulted in positive reaction. Make the diagnosis.
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A prosthodontist uses a mouth mirror for examination and manipulation during regular appointments. How are mouth mirrors sterilized?
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A 56-year-old male patient complains of pain in the left parotid-masticatory area and progressing facial asymmetry first noticed one month ago. The diagnosis is the cancer of parotid gland - T2N2. What method of treatment is optimal in the given case?
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A 20-year-old male patient complains of sharp pain in the mouth, increase of body temeperature up to 38,5°C, headache and aching joints, general weakness. The disease onset was 3 days ago due to overexposure to cold. Objectively: the lips red border has hemorrhagic scabs, oral mucosa has large erosions and ulcers merging with each other and covered with greyish-white coating on the background of diffuse hyperemia. Conjunctivitis is observed. The skin of the forearms has erythematous spots sized 1,5 cm in diameter, with blisters in their center. What is the most probable diagnosis?
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A 36-year-old female patient has complaint of the 23rd tooth filling constantly falling out. Objectively: the 23rd tooth has carious cavity of the V class according to the Black's classification of caries lesions. A dentist has made a decision to restore anatomical shape of the tooth with dental inlay. What is the specific feature of the cavity preparation for dental inlay in this case?
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A 68-year-old patient, having suffered from stroke, has time to time bouts of retching, which lead to unilateral diclocation of the temporormandibular joint. Setting the joint was possible only with anaesthesia. Objectively: absent are the following teeth - from the 21st to the 28th, 15th, 16th, 17th, 18th, 36th, 37th, 44th, 46th, 47th. What kind of denture construction will be optimal for the duration of treatment?
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Parents of a 12-year-old child are concerned about the child having white spots on the frontal teeth of the upper jaw; the spots appeared half a year ago. Objectively: there are chalky spots detected in the cervical zone of the 11th, 12th, 13th, 21st, 22nd, 23rd teeth vestibular surface. The enamel in those spots is dull; probing revealed it to be pliant and coarse. The anamnesis states short-time pain caused by chemical stimuli. What is the provisional diagnosis?
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A 47-year-old patient is undergoing dental treatment of erosive/ulcerative form of lichen ruber planus. 1-month-long conservative therapy was uneffective. What physiotherapeutic method is the most effective as a part of complex therapy?
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A 21-year-old patient complains of a constant progressing throbbing pain in the 27 tooth. Objectively: a large carious cavity is filled with softened dentin, the tooth cavity is closed. Probing of the cavity floor is painless, percussion causes acute pain, there is grade II tooth mobility. Palpation of the mucous membrane in the projection of the root apex of the 27 tooth causes pain. Radiological changes are absent. What is the most likely diagnosis?
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A child is 13 years old. The third upper tooth is fully cut, but situated slightly above the occlusion surface. What kind of abnormal placement is it?
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A 47-year-old patient complains of ulcer on the back of the tongue. The anamnesis states that the ulcer had been preceded for a long term by protruding infiltrate that was gradually growing until the ulcer appeared. Objectively: the back of the tongue has shallow oblong ulcer surrounded with bumps with undermined edge. What is the most probable diagnosis?
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A 16-year-old patient has made an appointment with a doctor due to the following complaints: enlarged lymph nodes and fistula in the submandibular area; general weakness; low grade fever. Objectively: the submandibular lymph nodes are dense and slightly painful, with clearly detectable margins. Caseous substance is produced from the fistulous tract. What is the most probable diagnosis?
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A 42-year-old patient complains of pain in the right side of her head, restricted movements of the lower jaw, clicking sound, periodic spasms of chewing muscles. Objectively: the face is symmetric, mouth opening is restricted. On palpation of the right temporo-mandibular joint (TMJ) there are crepitation and clicking accompanying mandible movements. Examination of the oral cavity revealed also a Kennedy's class II defect on the right. What is the most likely diagnosis?
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A 13-year-old child suffers from odontogenic osteomyelitis starting from the 36th tooth and complicated by abscess of the pterygomandibular space. The 36th tooth is to be extracted; it is necessary to open the pterygomandibular space. These operations require the following type of anaesthesia:
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Clinical stage of checking the clasp (bugel) dental prosthesis framework as it should be placed in the oral cavity revealed the denture arch to come off unevenly from the hard palate and alveolar process creating the gap up to 0,8 mm in width. What method can be applied to remove this defect?
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A 48-year-old man has an X-ray image of his lower jaw made during sanation of the oral cavity. Destruction of the bone tissue in the gonial angle area is detected, the pathology is not connected with tooth roots. The affected area has clear margins. Puncture consists of brown exudate without cholesterol crystals. What is the provisional diagnosis?
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A 20-year-old female patient complains of pain caused by eating sweet or sour food. Objectively: the vestibular surface of the 11th tooth has a chalky spot, coarse when probed. The centre of the spot has defect localised in the enamel. Fedorov-Volodkina index equals 2,5 (Oral Hygiene Index). What is the most probable diagnosis?
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A 50-year-old male patient complains of "small sore"on the sublingual mucosa. Pathomorphologic study of tissue sampling revealed the following: polymorphism of spiny epithelial cells has progressed into atypism; increased mitosis; giant and multinucleate cells; acanthosis; hyperkeratosis and parakeratosis; basal membrane and basal layer are retained. What is the most probable diagnosis?
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A 15-year-old adolescent complains of high body temperature up to 39, 5 — 40,0°C, vomiting, headache and sore throat, especially when swallowing. Objectively: oral mucosa is swollen, hyperemic. The patient is diagnosed with acute catarrhal gingivitis. The tonsils are hypertrophic and covered with yellow-grey coating that does not spread from lymphoid tissue and is easily removed. Submandibular, cervical, and occipital lymph nodes are significantly enlarged since the very first day of illness and are painful when palpated. The liver and spleen are enlarged. What is the most probable diagnosis?
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A patient complains of loss of feeling in the left side of his lower lip and chin, which occurred after the complicated extraction of the 37th tooth. Electric pulp test (EPT) revealed decrease in electroexcitability of the left lower jaw teeth. What is the most probable diagnosis?
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During the extraction of the 17 tooth the distal buccal root broke off and remained in the socket. Select a tool to extract the root:
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A partial removable denture is being made for a 50-year-old patient. What impression trays are the more advisable?
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